This is not "accurate" in the sense that I did these parses in the guild hall using specific buffs for a period of time, and I will detail which buffs were used as needed. All parses were done on Vlad using the ranger Rangar. I generally use lots of buffs and will probably not answer questions regarding specific buffs because they can all be looked up on the THF spell database

Parse #1: Bard 2.0, Shaman 2.0, Ranger 2.0, Deathmarch IV, Gladiator rk 2, hawk's talon rk 1, Rage of the hunter, Power of the forest rk I, True howl, Talisman of sense, Talisman of might, Power of fear, aged power, Word of the Alchemist
Bard songs: Warmarch of the Muram (no chaos), Slayer's destiny rk1
Parse 1 RESULTS:
Vlad on 10/2/2011 in 214sec
Rangar
--- DMG: 5085363 (100%) @ 23763 dps (23763 sdps)
--- MAX HIT: 23526
Special: 7: 7th yr vet G: Glyph K: Kiss S: Staunch X: Slain $: Saved by DI
Produced by GamParse v1.0.3
Parse #2: Bard 2.0, Shaman 2.0, Ranger 2.0, Deathmarch IV, Gladiator rk 2, hawk's talon rk 1, Rage of the hunter, Power of the forest rk I, True howl, Talisman of sense, Talisman of might, aged power, Trusehot discipline, Flight of wilderness
Bard songs: Warmarch of the Muram (no chaos), Slayer's destiny rk1
Vlad on 10/2/2011 in 117sec
Rangar
--- DMG: 3563338 (100%) @ 30456 dps (30456 sdps)
--- MAX HIT: 31520
Special: 7: 7th yr vet G: Glyph K: Kiss S: Staunch X: Slain $: Saved by DI
Produced by GamParse v1.0.3
note: ran out of endurance for max dps parse. max hit is 33044 with all previous buffs subbing chaotic wilderness for trueshot discipline.
Parse #3: Deathmarch IV, Gladiator rk 2, hawk's talon rk 1, Rage of the hunter, Power of the forest rk I, True howl, Talisman of sense, Talisman of might, aged power, Power of fear
Bard songs: Warmarch of the Muram (no chaos), Slayer's destiny rk1
Vlad on 10/2/2011 in 261sec
Rangar
--- DMG: 3553572 (100%) @ 13615 dps (13615 sdps)
--- MAX HIT: 17816
Special: 7: 7th yr vet G: Glyph K: Kiss S: Staunch X: Slain $: Saved by DI
Produced by GamParse v1.0.3
The thought behind this third parse is to show the dps my ranger does with no cooldowns up. keep in mind with the AA's and dark enhancement, bard/ranger/shaman 2.0 would be up about 50 percent of the time while Power of fear is ALMOST 100 percent uptime. I have power of fear on for this parse.
to get a realistic measure of my rangers' dps with no cooldowns, I would take the average dps of parse 1 and parse 3. Parse 2 is more just to show the maximum output I can do with rangers

EDIT: Spell Casting Reinforcement DOES affect duration of Trueshot Aura. 2 minutes and 40 second duration with the AA. I cannot confirm that it is only 2 minutes without the AA because all my rangers have the AA, is a must have IMO. (after EQ/AM3)